The codebreakers ; the story of secret writing.
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| Main Author: | |
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| Format: | Book |
| Language: | English |
| Published: |
London :
Weidenfeld and Nicolson,
[1966]
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| Subjects: |
| Physical Description: | xvi, 1164 pages : illustrations, facsimiles, portraits ; 24 cm |
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| Bibliography: | Includes bibliographical references. |